It will crash or have graphical glitches.
Mastercam 9.1 uses a very old Rainbow Sentinel driver. Mastercam 9.1 Download
The most common method. The original Mastercam 9.1 CD (often labeled "Mastercam Mill/Design/Lathe v9.1") is required. It will crash or have graphical glitches
The legacy of Mastercam 9.1 belongs in the history books—or on a dedicated, air-gapped Windows XP machine in a museum. It does not belong on your main production floor via a shady torrent link. Mastercam 9.1 Download